Description of Plate. 97 



Fig. 5. Restoration of the thoracic limbs of the fourth thoracic segment 



posterior to the head. 

 en. endopodite. ex. exopodite. 



Fig. 6. Diagramatic restoration of the second thoracic limb. (After 

 Beecher.) 



Fig. 7. Restoration of thoracic limb of Calymene senaria. 



en. endopodite. ex. exopodite. ep. epipodite. (Bull. Mus. 

 Cornp. Zool. Vol. 8, 1881.) 



Fig. 8. Cephalic limb of Calymene X 3 ; supposed antennule. 



Fig. 9. Cephalic limb figured by Dr. Henry Woodward. (Quart. Jour. 

 GeoL Soc. London. Vol. 26, 1870, p. 487. a. side of hy- 

 postoma. 



Fig. 10. Slender jointed legs associated in same beds with Calymene at 

 Cincinnati, Ohio. 



